You’ve just said that the problem is that people don’t use the tools provided to show how they intend to play. What actual improvement do you think will start them using the tools?
The current tools aren’t hard to use, and they are the same tools used throughout the site (not just for Hanabi). However, tech approaches rarely solve social problems, and you are talking about a social problem.
It’s an ELO rating. It is supposed to sit roughly around a value that denotes your skill. (It will fluctuate with each game, of course, so won’t sit precisely on that value, but it will remain close.) If it is working as designed, once your score rises to match your skill, it must give only a small number of points for a perfect game. If the system was changed to give you more points now, you would just rise to your new equilibrium, and then be complaining again.
Forget asking for more points for a win. It won’t happen, because if it did it would break the system. If you want more points, you need to improve your skill (so that you are playing 30-point games fairly consistently).